comparison: src/Parser.cc
src/Parser.cc
- changeset 111
- 87d9ebd3ef34
- parent 110
- 7a7a53f1d51b
- child 112
- def56932f938
equal
deleted
inserted
replaced
| 110:7a7a53f1d51b | 111:87d9ebd3ef34 |
|---|---|
| 120 | 120 |
| 121 case TK_Var: | 121 case TK_Var: |
| 122 ParseVar(); | 122 ParseVar(); |
| 123 break; | 123 break; |
| 124 | 124 |
| 125 case TK_Goto: | |
| 126 ParseGoto(); | |
| 127 break; | |
| 128 | |
| 129 case TK_If: | 125 case TK_If: |
| 130 ParseIf(); | 126 ParseIf(); |
| 131 break; | 127 break; |
| 132 | 128 |
| 133 case TK_Else: | 129 case TK_Else: |
| 181 case TK_Semicolon: | 177 case TK_Semicolon: |
| 182 break; | 178 break; |
| 183 | 179 |
| 184 default: | 180 default: |
| 185 { | 181 { |
| 186 // Check for labels | |
| 187 Lexer::Token next; | |
| 188 | |
| 189 if (TokenIs (TK_Symbol) && | |
| 190 mLexer->PeekNext (&next) && | |
| 191 next.type ==TK_Colon) | |
| 192 { | |
| 193 ParseLabel(); | |
| 194 break; | |
| 195 } | |
| 196 | |
| 197 // Check if it's a command | 182 // Check if it's a command |
| 198 CommandInfo* comm = FindCommandByName (GetTokenString()); | 183 CommandInfo* comm = FindCommandByName (GetTokenString()); |
| 199 | 184 |
| 200 if (comm) | 185 if (comm) |
| 201 { | 186 { |
| 230 { | 215 { |
| 231 // stateSpawn must be defined! | 216 // stateSpawn must be defined! |
| 232 if (mStateSpawnDefined == false) | 217 if (mStateSpawnDefined == false) |
| 233 Error ("script must have a state named `stateSpawn`!"); | 218 Error ("script must have a state named `stateSpawn`!"); |
| 234 | 219 |
| 235 // Ensure no goto target is left undefined | |
| 236 if (mUndefinedLabels.IsEmpty() == false) | |
| 237 { | |
| 238 StringList names; | |
| 239 | |
| 240 for (UndefinedLabel& undf : mUndefinedLabels) | |
| 241 names << undf.name; | |
| 242 | |
| 243 Error ("labels `%1` are referenced via `goto` but are not defined\n", names); | |
| 244 } | |
| 245 | |
| 246 // Dump the last state's onenter and mainloop | 220 // Dump the last state's onenter and mainloop |
| 247 writeMemberBuffers(); | 221 writeMemberBuffers(); |
| 248 | 222 |
| 249 // String table | 223 // String table |
| 250 WriteStringTable(); | 224 WriteStringTable(); |
| 263 if (statename.FirstIndexOf (" ") != -1) | 237 if (statename.FirstIndexOf (" ") != -1) |
| 264 Error ("state name must be a single word, got `%1`", statename); | 238 Error ("state name must be a single word, got `%1`", statename); |
| 265 | 239 |
| 266 // stateSpawn is special - it *must* be defined. If we | 240 // stateSpawn is special - it *must* be defined. If we |
| 267 // encountered it, then mark down that we have it. | 241 // encountered it, then mark down that we have it. |
| 268 if (-statename == "statespawn") | 242 if (statename.ToLowercase() == "statespawn") |
| 269 mStateSpawnDefined = true; | 243 mStateSpawnDefined = true; |
| 270 | 244 |
| 271 // Must end in a colon | 245 // Must end in a colon |
| 272 mLexer->MustGetNext (TK_Colon); | 246 mLexer->MustGetNext (TK_Colon); |
| 273 | 247 |
| 409 SCOPE(0).localVariables << var; | 383 SCOPE(0).localVariables << var; |
| 410 | 384 |
| 411 SuggestHighestVarIndex (IsInGlobalState(), var->index); | 385 SuggestHighestVarIndex (IsInGlobalState(), var->index); |
| 412 mLexer->MustGetNext (TK_Semicolon); | 386 mLexer->MustGetNext (TK_Semicolon); |
| 413 Print ("Declared %3 variable #%1 $%2\n", var->index, var->name, IsInGlobalState() ? "global" : "state-local"); | 387 Print ("Declared %3 variable #%1 $%2\n", var->index, var->name, IsInGlobalState() ? "global" : "state-local"); |
| 414 } | |
| 415 | |
| 416 // ============================================================================ | |
| 417 // | |
| 418 void BotscriptParser::ParseGoto() | |
| 419 { | |
| 420 CheckNotToplevel(); | |
| 421 | |
| 422 // Get the name of the label | |
| 423 mLexer->MustGetNext (TK_Symbol); | |
| 424 | |
| 425 // Find the mark this goto statement points to | |
| 426 String target = GetTokenString(); | |
| 427 ByteMark* mark = buffer()->FindMarkByName (target); | |
| 428 | |
| 429 // If not set, define it | |
| 430 if (mark == null) | |
| 431 { | |
| 432 UndefinedLabel undf; | |
| 433 undf.name = target; | |
| 434 undf.target = buffer()->AddMark (target); | |
| 435 mUndefinedLabels << undf; | |
| 436 } | |
| 437 | |
| 438 // Add a reference to the mark. | |
| 439 buffer()->WriteDWord (DH_Goto); | |
| 440 buffer()->AddReference (mark); | |
| 441 mLexer->MustGetNext (TK_Semicolon); | |
| 442 } | 388 } |
| 443 | 389 |
| 444 // ============================================================================ | 390 // ============================================================================ |
| 445 // | 391 // |
| 446 void BotscriptParser::ParseIf() | 392 void BotscriptParser::ParseIf() |
| 862 buffer()->WriteDWord (dataheader); | 808 buffer()->WriteDWord (dataheader); |
| 863 mCurrentMode = PARSERMODE_TopLevel; | 809 mCurrentMode = PARSERMODE_TopLevel; |
| 864 mLexer->GetNext (TK_Semicolon); | 810 mLexer->GetNext (TK_Semicolon); |
| 865 } | 811 } |
| 866 | 812 |
| 867 // ============================================================================ | |
| 868 // | |
| 869 void BotscriptParser::ParseLabel() | |
| 870 { | |
| 871 CheckNotToplevel(); | |
| 872 String labelName = GetTokenString(); | |
| 873 ByteMark* mark = null; | |
| 874 | |
| 875 // See if a mark already exists for this label | |
| 876 for (UndefinedLabel& label : mUndefinedLabels) | |
| 877 { | |
| 878 if (label.name != labelName) | |
| 879 continue; | |
| 880 | |
| 881 mark = label.target; | |
| 882 buffer()->AdjustMark (mark); | |
| 883 | |
| 884 // No longer undefined | |
| 885 mUndefinedLabels.Remove (label); | |
| 886 break; | |
| 887 } | |
| 888 | |
| 889 // Not found in unmarked lists, define it now | |
| 890 if (mark == null) | |
| 891 buffer()->AddMark (labelName); | |
| 892 | |
| 893 mLexer->MustGetNext (TK_Colon); | |
| 894 } | |
| 895 | |
| 896 // ============================================================================= | 813 // ============================================================================= |
| 897 // | 814 // |
| 898 void BotscriptParser::ParseEventdef() | 815 void BotscriptParser::ParseEventdef() |
| 899 { | 816 { |
| 900 EventDefinition* e = new EventDefinition; | 817 EventDefinition* e = new EventDefinition; |
